AS13122 — MANX-AS MANX-TELECOM Autonomous System

AS13122 announces 20 IPv4 prefixes covering 48,128 addresses and 1 IPv6 prefixes.

About this network

Eight IPv6 announcements of doubling size, covering half an allocation in a perfect binary cascade.

What it's used for

• The telecommunications operator of the Isle of Man. 48,128 addresses across 27 IPv4 prefixes, 12 IPv6 prefixes, and 134 observed BGP neighbours.

Notable

• Eight of the IPv6 announcements run /40, /40, /39, /38, /37, /36, /35, /34, each starting where the last one ends.
• Netnames are all IM-MANX, dated 970813, 19991224, 20040519, 20051013, 20080116, 20080304, 20100218, 20110125, 20111227, 20140714 and 20141204.
• Reverse names glue a product label directly onto the address, as in adsl92.39.203.254.manx.net.

Interesting

• The cascade of doubling prefixes is the exact output of an algorithm asked to cover a range whose start is not aligned to its size. Nothing about the network requires eight announcements where one would do; a tool decomposed the range into the largest aligned blocks that fit, and the result was advertised verbatim.
• A six-digit 970813 and an eight-digit 19991224 sit two years apart in one holder's own records. The two date forms were never successive conventions, whatever the digit count suggests.
• 134 neighbours for an island of this size is the giveaway that a national operator peers on the mainland: the address count is small, the peering is not.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 37.25.88.0/21
• 43.225.112.0/22
• 46.226.184.0/21
• 66.132.133.0/24
• 80.65.240.0/20
• 82.41.73.0/24
• 86.38.4.0/24
• 87.254.64.0/19
• 89.116.126.0/24
• 92.39.192.0/20
• 151.242.28.0/24
• 178.16.0.0/20
• 185.63.184.0/22
• 195.10.96.0/19
• 213.137.0.0/21
• 213.137.8.0/22
• 213.137.12.0/24
• 213.137.14.0/23
• 213.137.16.0/20
• 217.28.0.0/20
• 2a01:6a00::/29

Upstream networks

• AS3356 Level 3 Parent, LLC
• AS6939 Hurricane Electric LLC
• AS1299 Arelion Sweden AB
• AS9002 RETN Limited
• AS34549 meerfarbig GmbH & Co. KG
• AS50304 Blix Solutions AS
• AS48185 team.blue NV
• AS50300 CustodianDC Limited
• AS24482 SG.GS
• AS48362 Stadtwerke Feldkirch
• AS12552 GlobalConnect AB
• AS57463 NetIX Communications JSC
• AS3216 PJSC "Vimpelcom"
• AS37721 Virtual Technologies & Solutions
• AS37100 SEACOM Limited
• AS17639 Converge ICT Solutions Inc.
• AS3741 Dimension Data
• AS50673 Serverius Holding B.V.
• AS3333 Reseaux IP Europeens Network Coordination Centre (RIPE NCC)
• AS293 ESnet
• AS20766 Association "Gitoyen"
• AS34927 iFog GmbH
• AS33891 Core-Backbone GmbH
• AS29075 IELO-LIAZO SERVICES SAS
• AS49559 A-Systems Sp. z o.o.

Downstream networks

• AS44481 Professional Data Management Services Limited
• AS57198 OV Limited
• AS201898 BlueWave Communications Limited

Adjacent networks

• AS3356 Level 3 Parent, LLC
• AS1299 Arelion Sweden AB
• AS6939 Hurricane Electric LLC
• AS9002 RETN Limited
• AS34549 meerfarbig GmbH & Co. KG
• AS44481 Professional Data Management Services Limited
• AS57198 OV Limited
• AS50304 Blix Solutions AS
• AS48185 team.blue NV
• AS12552 GlobalConnect AB
• AS3216 PJSC "Vimpelcom"
• AS37100 SEACOM Limited
• AS37721 Virtual Technologies & Solutions
• AS24482 SG.GS
• AS48362 Stadtwerke Feldkirch
• AS50300 CustodianDC Limited
• AS57463 NetIX Communications JSC
• AS17639 Converge ICT Solutions Inc.
• AS3741 Dimension Data
• AS3333 Reseaux IP Europeens Network Coordination Centre (RIPE NCC)
• AS50673 Serverius Holding B.V.
• AS293 ESnet
• AS34927 iFog GmbH
• AS20766 Association "Gitoyen"
• AS33891 Core-Backbone GmbH

Internet exchanges

• LINX LON1 — London, United Kingdom
• AMS-IX Amsterdam — Amsterdam, Netherlands
• LINX Manchester — Manchester, United Kingdom